Date Added: Jan 2012
Now a day's most vital part of research covers on wireless ad-hoc sensor networks due to broad collection of prospective applications. A wireless sensor network causes a new theoretical and challenging optimization problem. Now here the authors discuss one of the essential problems of coverage in sensor networks, which reflects the quality of surveillance of accurate sensor network. The conception of coverage is considered from several points of view due to a variety of sensor networks and ample sort of their applications. They inclusively present tentative outcomes and overview of future research information related to coverage of sensor networks.